INFO: task syz-executor.2:6078 blocked for more than 143 seconds. Not tainted 6.12.0-rc3-syzkaller-gc964ced77262 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28624 pid:6078 tgid:6076 ppid:6038 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6774 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 blkdev_common_ioctl+0xe7b/0x2480 block/ioctl.c:622 blkdev_ioctl+0x4ca/0x6a0 block/ioctl.c:687 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb877c7cae9 RSP: 002b:00007fb878a1e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb877d9c050 RCX: 00007fb877c7cae9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004 RBP: 00007fb877cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fb877d9c050 R15: 00007ffd229b99e8 INFO: task syz-executor.4:6080 blocked for more than 143 seconds. Not tainted 6.12.0-rc3-syzkaller-gc964ced77262 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27360 pid:6080 tgid:6079 ppid:6041 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6774 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 blkdev_ioctl+0x40c/0x6a0 block/ioctl.c:682 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd2dca7cae9 RSP: 002b:00007fd2dd7940c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd2dcb9bf80 RCX: 00007fd2dca7cae9 RDX: 0000000020000380 RSI: 00000000c0481273 RDI: 0000000000000004 RBP: 00007fd2dcac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fd2dcb9bf80 R15: 00007ffe41d3c758 INFO: task syz-executor.4:6081 blocked for more than 144 seconds. Not tainted 6.12.0-rc3-syzkaller-gc964ced77262 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:25216 pid:6081 tgid:6079 ppid:6041 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6774 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 blkdev_common_ioctl+0xe7b/0x2480 block/ioctl.c:622 blkdev_ioctl+0x4ca/0x6a0 block/ioctl.c:687 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd2dca7cae9 RSP: 002b:00007fd2dd7730c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd2dcb9c050 RCX: 00007fd2dca7cae9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004 RBP: 00007fd2dcac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fd2dcb9c050 R15: 00007ffe41d3c758 Showing all locks held in the system: 3 locks held by kworker/0:1/9: #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc900000e7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc900000e7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffff88808a109240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1488 1 lock held by khungtaskd/30: #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 2 locks held by getty/4988: #0: ffff88802ea640a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/u9:2/5239: #0: ffff888097f2b148 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888097f2b148 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90003defd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003defd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffff888079fecd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327 2 locks held by syz-executor.2/6077: 1 lock held by syz-executor.2/6078: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.4/6080: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.4/6081: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.0/6099: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.0/6100: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.3/6117: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.3/6118: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.5/6142: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.5/6143: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.1/6190: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.1/6191: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.2/6199: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.2/6200: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.4/6202: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.4/6203: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.0/6224: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.0/6225: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.3/6243: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.3/6244: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.5/6267: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.5/6268: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.1/6308: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.1/6309: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.2/6329: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.2/6332: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.4/6338: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.4/6339: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.0/6345: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor.0/6346: #0: ffff8880258411d0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 2 locks held by syz-executor.3/6350: #0: ffffffff8fcd2c08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcd2c08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672 #1: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-gc964ced77262 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 2540 Comm: kworker/u8:6 Not tainted 6.12.0-rc3-syzkaller-gc964ced77262 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:390 [inline] RIP: 0010:__rcu_read_lock+0x34/0xb0 kernel/rcu/tree_plugin.h:413 Code: 49 be 00 00 00 00 00 fc ff df 65 4c 8b 3c 25 c0 d7 03 00 49 81 c7 44 04 00 00 4c 89 fb 48 c1 eb 03 42 0f b6 04 33 84 c0 75 35 <41> 8b 2f ff c5 42 0f b6 04 33 84 c0 75 3e 41 89 2f 42 0f b6 04 33 RSP: 0018:ffffc900090efb30 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 1ffff11005bcf808 RCX: ffff88802de7bc00 RDX: 0000000000000000 RSI: ffffffff8c0adc40 RDI: ffffffff8c610120 RBP: ffff88809dc886d8 R08: ffffffff901cfe6f R09: 1ffffffff2039fcd R10: dffffc0000000000 R11: fffffbfff2039fce R12: ffff888079a94cc0 R13: 00000000000000db R14: dffffc0000000000 R15: ffff88802de7c044 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe8346c35c0 CR3: 00000000a9140000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:847 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0xc4/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244